WHAT ARE HUB-MOTORS
Hub motors, also called in-wheel motors or wheel hub motors, are electric motors that are built into the hub of a wheel.
They combine the wheel and motor into one integrated unit.Hub motors work by using a brushless DC motor design. The stator, which contains the magnet wire coils, stays stationary and attaches to the bike or vehicle frame.
The rotor spins inside the stator and connects to the wheel hub and rim to provide forward propulsion. Electric current flowing through the coils creates a rotating magnetic field that causes the permanent magnet rotor to spin.
Hub motors offer several key advantages:
- Compact, lightweight, and simple design compared to traditional motors and drivetrains
- Increased efficiency due to fewer mechanical components and direct power transfer
- Flexible configurations – can be front, rear, or all-wheel drive
- Open up vehicle design space since no separate engine compartment is needed
However, hub motors also have some disadvantages:
- Add unsprung weight which can negatively impact ride quality and handling
- More expensive and complex than standard wheels
- High voltage electronics are exposed to weather and road hazards
Hub motors are increasingly being used in electric bicycles and electric cars due to their compact size, efficiency, and flexibility.
As the technology continues to mature, hub motors may become more prevalent across the automotive industry.
Introduction to the two types of E-bike Hub Motors
Electric bicycle hub motors are electric motors located inside the hub of a bike’s wheel to provide propulsion assistance. Hub motors come in two main types – geared hub motors and direct drive hub motors.
Geared hub motors: have internal planetary gear reduction systems that allow the motor to spin faster internally while the wheel spins at a slower speed. The gears provide more torque and allow the motor to be smaller and lighter.
Direct drive hub motors: directly connect the motor to the wheel, so the motor spins at the same speed as the wheel. Direct drive motors tend to be bigger and heavier to produce enough torque, but have very few moving parts so require little maintenance.
Both types of motors have their own pros and cons and are suited for different riding needs and conditions. This article provides a detailed comparison between geared and direct drive e-bike hub motors in terms of features, capabilities, advantages, disadvantages and ideal applications.
Power and Torque
Geared hub motors can produce very high torque from a standstill or low speeds, allowing strong acceleration and hill climbing ability. Their high torque comes from the internal gears that allow the small motor to spin faster while slowing down the wheel speed.
Direct drive motors produce less torque at low RPMs. Their torque is limited by the wheel size and RPM. So direct drives struggle with starting, acceleration and hill climbing unless very large and heavy.At higher RPMs above 20 mph, direct drive motors build speed and power more efficiently than geared motors. But most e-bikes are limited to 20-28 mph.
Efficiency
Geared hub motors are typically more efficient at lower speeds under 20 mph. Their gear reduction allows the motor to spin at optimal high RPMs while the wheel spins slower. This makes them very efficient for most e-bike riding.
Direct drives are less efficient at low speeds because the motor spins at the same lower RPM as the wheel. But they can be more efficient at very high speeds above 20 mph where geared motors struggle.
So for average e-bike use at under 20mph, geared hubs motors are generally more efficient, providing more range from the battery.
Weight
Geared hub motors are much smaller and lighter than direct drives with comparable power. Their gears provide torque multiplication from a small motor. This reduces overall e-bike weight compared to a direct drive.
Direct drive motors must be larger and heavier to produce enough torque. All this weight is added to the wheels, negatively impacting acceleration, handling and portability.
Noise
Geared hub motors operate with more noise than direct drives due to the internal gear reduction system. The gear noise is usually not very loud, but direct drives are virtually silent.
Maintenance and Durability
Direct drive motors have very few moving parts – just bearings and magnets spinning around coils. So they require little maintenance and their simple construction allows them to potentially last longer.
Geared motors have more moving parts and gears that wear over time. So they require more periodic maintenance and likely need replacing sooner than a direct drive motor.
Cost
Direct drive hub motors are generally much cheaper than geared motors to produce.
Geared motors require more precision components and assembly to create the internal gear system. This makes direct drives the budget option.
Applications
Geared hub motors are ideal for:
- City/commuting e-bikes: Frequent start/stop
- Cruising at lower average speeds
- Lightweight builds
- Smooth power delivery
Direct drive hub motors excel at:
- High speed e-bikes: Above 20 mph
- Regenerative braking
- Simple and quiet operation
- Low maintenance requirements
Why To7motor’s Hub Motor Stands Above the Rest
Superior Performance
Our hub motors are designed to deliver exceptional levels of power and torque. Many of their motors can output over 1000W of continuous power along with 80Nm or more of torque.
This enables excellent acceleration and the ability to climb steep hills even when carrying cargo or passengers. The power levels match or exceed mid-drive motors.
High Efficiency
Efficiency ratings of 80% or higher mean less energy gets wasted as heat. This allows our hub motors to operate cooler compared to less efficient alternatives.
Riders benefit through improved range from the battery. Less heat also reduces wear and tear on the motor.
Whisper Quiet Operation
We utilize high-quality magnets and precision manufacturing to minimize noise and vibrations from their motors.
Most operate at under 50dB for an enjoyable and peaceful riding experience. The quiet operation contributes to their appeal for urban e-bike applications.
Customizable Power
Many To7motor motors provide the ability to customize power output across a wide range. For example, the B7-145KL can be set from 350W up to 750W.
This caters the motor output to match the rider’s needs and local e-bike regulations. Less powerful settings also promote longer battery range when desired.
1. TO7MOTOR: THE D79-190KL HUB MOTOR: THE POWER OF 2000W (1000W, 1500W, 2000W)
The D79-190KL is the latest addition to our powerful D79 Series of electric bike hub motors.
USAGE:
- E-CARGO BIKE
- E-FAT TIRE BIKE
As part of the D79 lineup, it packs all of the impressive performance and durability that our motors are known for. This 190mm wide rear hub motor is purpose-built for fat tire electric bikes, with its robust design and torque-biased power delivery providing exceptional off-road capabilities.
Like all of our motors, the D79-190KL utilizes precision zero-cogging winding technology for smooth, quiet power along with advanced vector control and a smart controller for optimized efficiency. We offer the D79-190KL in multiple power levels up to 2,000W, with mighty 110Nm of peak torque on tap to conquer any terrain.
The rugged aluminum housing and IP65 waterproof construction allow this motor to thrive in any riding conditions.
If you’re looking to build the ultimate high power fat tire e-bike that can devour hills and charge across muddy, uneven trails, our new D79-190KL motor delivers the exceptional quality and trail-taming performance you expect from to7motor.
Colour
The D79 motor comes in two colour options – black or silver. The colour is purely aesthetic, affecting only the outward appearance of the motor.
Some customers may prefer the stealthy look of an all-black ebike, while others may like the contrast of a silver motor against black frame tubing. Ultimately the colour does not impact performance.
Installation Site
This motor is purpose-built for rear wheel installation. Mounting a hub motor on the rear drops weight over the drive wheel to improve traction.
This is especially helpful for climbing steep hills, where traction is most challenged. The rear is ideal for a geared hub like the D79 too, allowing the high torque to be reduced through gearing for smooth power delivery.
Front hub motors can sometimes overwhelm the front wheel on powerful ebikes.
Applied for E-bikes
As a 190mm wide hub, the D79 is optimized for fat tire e-bikes. Fat bikes with 3.5-5 inch wide tires are popular for riding across sand, snow and other soft terrain where the huge contact patch provides flotation and traction.
The wider hub spacing accommodates these big tires while maintaining proper spoke angles for wheel strength. The ample torque from the motor is well suited muscling these heavier bikes around.
A powerful, torquey motor is ideal since the rotary mass of the heavy wheels otherwise makes starting and stopping difficult.
Cable Routing
The motor cables for power and data exit the left side of this hub. This cleanly integrates into ebike frames, with the cables hidden inside the frame tubing for minimal exposure and neat aesthetics.
Exiting just one side also eases wheel removal for maintenance compared to hubs with cables on both sides. The cables being fully internal adds to the sealed environmental protection.
Cable Length
At 200mm total length, the cables offer reasonable flexibility for wiring within the bike frame. Shorter cables can restrict layout options and require tight bends, while longer cables require more accommodation space. 200mm hits the sweet spot between length and compact routing.
Sprocket Wheel
The D79 is drilled to fit standard 8, 9 or 10 tooth freewheel sprockets. More sprocket teeth provide higher torque to the wheel, while fewer teeth provide more outright speed.
8T would be selected for highest speed while 10T maximizes torque for off-road use. 9T strikes a good balance. These smaller sprockets complement the high internal gear reduction for big torque multiplication.
Brake Style
This motor is compatible with basic hydraulic or mechanical disc brakes. Discs provide excellent stopping power across all weather conditions, essential for controlling powerful ebike motors.
The discs mount to standard threaded rotor mounts on the motor exterior. This allows fitting any bike’s disc brake system to the motor very easily.
Spokes Holes
The hub flanges are drilled for 36 spokes. More spokes distribute torque over more wheels for a stronger wheel that stays true even under high loads.
36 spokes is the accepted standard for ebike rear wheels seeing significant power. The spokes connect to thick flanges to handle the forces.
Spokes Size
Either 13 gauge (2.3mm) or swaged 12 gauge (2.6mm) spokes should be used. Thicker spokes are very strong in tension and resistant to fatigue over bumps.
They also tolerate higher torque loads without winding up compared to thinner spokes common on bicycle wheels.
Spokes Central Distance
At 174mm, the hub spacing matches most common fat e-bikes. Maintaining this standard spacing allows fitting the wheels to compatible bikes without issue.
Open Size
A 190mm open width between the hub flange provides clearance for fat 3.5-5″ tires.
This is substantially wider than normal hubs, required to prevent bulky tire sidewalls from rubbing under compression.
Wheel Size
The D79 fits all modern ISO bicycle wheel sizes from 406mm (20″) to 622mm (700c).
It also accommodates old English sizes like 26″. This versatility allows creating complete wheels for virtually any ebike.
Voltage
Configured to operate on 48V or 52V electrical systems. Higher voltage extends top speed while lower voltage provides cheaper batteries and better efficiency.
An advanced programmable controller allows custom tuning the motor for any voltage between 48V and 60V as needed. Higher voltage unlocks more peak power.
Rated Power
Available in 1,000W, 1,500W or 2,000W configurations to suit light, moderate or hot rod power levels. More rated watts generally provides higher peak torque for acceleration and climbing.
It also extends top speed under ideal conditions. The level of power should match the bike application.
Max Speed
The motors achieve 50-60 km/h maximum speed depending on power level. The 2,000W version reaches the highest speeds over 60 km/h, while the 1,000W motor peaks just above 50 km/h.
This gives a wide range to fit legal regulations.
Max Torque
110 Nm of torque is extremely strong for an ebike hub motor. For comparison, mid-drive motors might offer just 70-80 Nm.
More torque provides better traction and hill climbing without needing to gear down using the bike’s gears. Less gear shifting improves the riding experience.
Reduction Ratio
The internal 5.8:1 gear reduction generates higher torque from the motor while limiting top speed.
This tuning suits the fatbike application where traction and acceleration are most important. A high torque bias also prevents burnout across loose terrain.
Magnet Items
More magnets concentrated into the motor boost torque density for impressive power from a compact package.
The D79 uses 16 high strength neodymium magnets. More magnets require more counteracting stator windings, keeping electromagnetic forces under control.
Speed Sensor
Multiple speed sensors placed around the motor inform the smart controller of the motor’s position and speed.
This enables precise vector control by the controller to maximize efficiency and fine tune the power delivery. More sensors provide smoother torque control and response.
Efficiency
An impressive 80% efficiency minimizes electrical losses through resistance heating, maximizing range from the battery.
High efficiency requires precision winding of the stator coils and advanced control algorithms. Efficiency drops when exceeding the rated power.
Work Temperature
Functional across an extreme temperature range from -20°C freezing to 45°C heat. The motor can be used year-round without climate impacting performance or reliability.
The controller throttles power if approaching the temperature limits to avoid overheating damage.
Noise Level
The precision zero-cogging winding technology keeps mechanical noise below 50 dBA even under high loads.
This quiet operation doesn’t disturb wildlife or communities when riding off-road. It also doesn’t attract unwanted attention.
Weight
At just 5.9 kg, the D79 is reasonably lightweight given its robust construction and high power / torque ratings. Less weight improves handling and ride feel compared to bulky direct drive motors. It also avoids burdening the bike dynamics.
Waterproof Level
Meeting IP65 requirements proves the motor resists dust ingress and direct high pressure water jets. The high waterproofing withstands wet, gritty riding conditions without shorting or corrosion issues over time.
Shells Material
The outer casing uses lightweight yet strong aluminum alloy rather than steel or plastic. This saves considerable weight while providing excellent structural and heat dissipation properties. Aluminum better manages swelling/contraction across extreme temperature fluctuations too.
Summary
the D79-190KL is an extremely capable hub motor perfectly suited for high power fat tire e-bikes and E-cargo bikes thanks to its wide diameter, high torque, and robust weatherproof design.
It hits the sweet spot of power, torque, efficiency and weight to muscle these heavy bikes across all terrain in all conditions. The wide configuration options let riders scale the performance to their needs and regional regulations.
2. TO7MOTOR D7-135QL HUB MOTOR: ENOUGH TO POWER YOUR RIDES (350W, 500W, 750W)
The D7-135QL is the latest addition to our D7 Series direct drive hub motor lineup.
USAGE:
- E-CARGO BIKE
- E-FAT TIRE BIKE
As part of the D7 Series, it packs the same robust performance and durability into a slimmer 135mm wide package designed specifically for the front wheel.
Built for all-terrain e-bikes, this new front hub motor delivers mighty 90Nm of torque in a compact size to electrify your e-cargo or fat tire bike for conquering off-road rides.
Like all our motors, the D7-135QL offers customizable power levels up to 750W, liquid-smooth response thanks to advanced vector control, and resilient all-weather construction with an IP65 rating.
If you want to experience the trail-taming power and fuss-free reliability synonymous with to7motor, this new front wheel drive D7-135QL motor brings formidable performance ideal for upgrading your existing bike or building your dream e-MTB from scratch.
Colour
We offer the D7-135QL hub motor in both stealthy black or eye-catching silver finishes to match your ebike’s style.
The colour does not affect performance – it is purely aesthetic to give you a motor that looks good on your bike. Some customers prefer an all-black ebike for a mean, stealthy look, while others like the machined aluminum look of a silver motor with black frame contrast.
Installation Site
This hub motor is engineered for front wheel installation, providing front wheel drive. Mounting it up front balances the bike’s weight distribution by adding weight over the front tire.
This weight bias improves high speed stability and handling compared to rear hub motors that can make the rear end wander.
Front hub motors also climb exceptionally well, using the rider’s mass sitting over the drive wheel to increase traction. Less spinning or wheel slip is experienced compared to lighter rear ends.
Applied for E-bikes
The D7-135QL is optimized for, fat tire and cargo e-bikes that need substantial power to conquer trails or haul heavy loads. The torquey power delivery prevents wheel spin so you always get maximum traction.
We spec’ed it to thrive under high loads so it won’t let you down, even riding 2-up. It has potential for light electric motorcycles too.
Cable Routing
The power and data cables exit only the left side of this hub motor for clean frame integration. This allows hiding the wires neatly inside the frame tubing so you don’t see any messy external wires dangling about.
Exiting just one side also makes removing the front wheel quicker for maintenance since you don’t have to unplug cables from both sides.
Cable Length
The total cable length is 200mm which gives reasonable flexibility for wiring inside the frame.
Shorter cables can be restrictive to work with and require tight bends, while longer cables require more accommodation space in the frame. We’ve found 200mm to be the ideal balance between length and compact routing.
Sprocket Wheel
This direct drive hub does not use a sprocket. It drives the wheel directly with no gear reduction.
Direct drive maximizes durability and minimizes maintenance since there are no gears inside that can fail over time. It also allows regenerative braking to charge the battery.
Brake Style
The D7-135QL works with basic hydraulic or mechanical disc brakes for all-weather stopping power.
Discs have far greater wet weather performance than rim brakes. Being able to lock up the front wheel gives you the utmost control. The hub has industry standard mount points to fit your bike’s discs.
Spokes Holes
The hub flanges utilize a 36 hole drilling pattern to lace three cross patterns using 12-13g spokes. More spokes spreads the torque over more wheels for a stronger wheel that stays true even pounding through rough terrain.
36 hole is the accepted standard for ebike applications seeing high torque. The spokes all connect to thick flanges coming off the hub to handle the forces.
Spokes Size
Either 13 gauge (2.3mm) or swaged 12 gauge (2.6mm) spokes must be used to handle the torque loads.
Thicker spokes are very strong in tension and fatigue resistant compared to thinner spokes used on bicycle wheels. The thicker spokes are less likely to wind up or break under high loads.
Spokes Central Distance
At 144mm, the hub spacing matches wider “boost” fat-tire bikes, as well as many fat tire e-bikes. This wider spacing creates a laterally stiffer wheel using shorter spokes.
Shorter spokes are stronger and more durable. The boost spacing also clears wide tires without rubbing the frame.
Open Size
The 135mm open width between the hub flange walls provides clearance for fat 3.5-4″ tires without rubbing under compression. Wider than a standard 100mm hub.
Wheel Size
The hub motor fits all modern ISO bike wheel sizes from 406mm (20″) to 622mm (700c), as well as old English sizes like 26″. This versatility allows creating complete wheels for virtually any e-bike.
Voltage
Configured to operate on common 36V, 48V or 52V eBike battery supplies. Higher voltage extends top speed while lower voltage allows cheaper battery options and improves efficiency.
Custom tuning allows adjusting the motor for any voltage between 36V and 60V.
Rated Power
Available in 350W, 500W or 750W power levels to match your performance needs and regional regulations.
More power provides faster acceleration and higher top speeds, while limiting power increases efficiency for longer range. Lots of low end torque makes easy work of hills.
Max Speed
Supports 40-50 km/h max speeds depending on power level. The 750W does over 50 km/h with ideal conditions.
The max speed is limited by voltage and internal gear ratio, not power. So a lower power motor can achieve the same max speed given enough voltage.
Max Torque
Over 90 Nm of torque rips across all sorts of terrain and flies up steep hills. Less gear shifting improves the riding experience. Way more torque than a mid drive motor in a compact hub package.
Reduction Ratio
A very high 7.77:1 ratio gives tremendous torque multiplication from the motor to the wheel for direct drive. This gives great off-road performance but limits top speed. The massive low end power makes easy work of technical trails.
Magnet Items
16 high strength neodymium magnets deliver impressive torque density from a compact hub package for its power level. More magnets require more counteracting stator windings, keeping electromagnetic forces under control.
Speed Sensor
Multiple speed sensors around the motor provide precise positional and speed feedback to the smart controller for optimal torque vectoring control.
More sensors give smoother low speed modulation and response for great handling.
Efficiency
Class-leading 80% efficiency minimizes electrical losses through resistance heating, reducing battery drain for excellent range per charge. High efficiency requires sophisticated construction and control algorithms.
Work Temperature
Functional across a wide -20° C to 45° C temperature range in all climates without performance deterioration or reliability concerns. The controller throttles power nearing the limits to avoid overheating damage.
Noise Level
Precision zero-cogging winding technology keeps noise below 50 dBA even pounding up steep hills. Quiet performance doesn’t disturb wildlife or communities enjoying nature. The direct drive mechanism is silent too since it has no gears.
Weight
At just 4 kg, the D7-135QL is remarkably lightweight for the performance. Less unsprung weight improves suspension function and handling for increased control and comfort across rough terrain.
Waterproof Level
A high IP65 rating proves the D7-135QL resists dust ingress as well as direct high pressure water jets from any direction. The motors withstand gritty, wet riding conditions for years without corrosion or electrical issues.
Shells Material
The hub outer case uses light yet strong aluminum alloy rather than steel or plastic to achieve a great power to weight ratio.
Aluminum offers excellent structural properties under high loads while also conducting heat well from inside the motor. This ensures excellent thermal performance across long mountain climbs. The aluminum also resists damage from vibration and shock loads through demanding terrain.
Summary
The D7-135QL is an extremely capable front hub motor perfect for e-cargo bikes and high power fat tire e-bikes needing to conquer demanding trails.
Its direct drive powertrain eliminates internal gears that can fail over time while providing way more torque than a mid drive motor. If you want an ultra reliable, zero maintenance hub motor to electrify your fat-tire bike for aggressive trail riding, the D7-135QL delivers exceptional quality and performance.
3. TO7MOTOR: THE S7-175XR HUB MOTOR: PERFECT CHOICE FOR YOUR FAT TIRE E-BIKE AND E-CARGO (350W, 500W, 750W) [PUBLIC MOLD]
The S7-175XR is the newest addition to our trail-taming S7 Series of electric bike hub motors.
USAGE:
- E-CARGO BIKE
- E-FAT BIKE
As part of the S7 lineup, this 175mm wide rear hub motor packs potent power and rugged durability purpose-built for aggressive all-terrain performance e-bikes.
Specifically optimized for electric cargo and fat bikes that require extreme torque for conquering demanding trails, the S7-175XR delivers 75Nm of tenacious torque from a compact package.
Equipped with our most advanced control firmware for unparalleled responsiveness and efficiency, this new rear wheel drive S7 motor brings formidable performance for upgrading existing bikes or scratch-built e-MTB and e-Fat machine builds.
Colour
We offer the S7-175XR hub motor in both menacing gloss black or natural silver finishes. The colour choice is purely aesthetic to match your ebike’s style – it does not impact technical performance.
Some customers love the aggressive look of an all-black stealth ebike, while others prefer the contrasting machined aluminum look of a silver motor with black frame.
We can even customize other colour options for volume orders if you want to perfectly match our hub to your bike’s custom paint.
Installation Site
This rear hub motor provides rear wheel drive power. Mounting a geared hub motor in the rear allows the high torque output to be reduced through additional gearing using the bike’s gears. This allows tuning the power delivery for smooth traction and control.
Rear drive also places more weight over the drive wheel compared to a front hub. This extra mass improves traction so you can put more power down without wheel spin.
The rear is also ideal for cargo e-bikes where the heavy load is already over the back.
Applied for E-bikes
The S7-175XR is purpose-built for aggressive all-terrain performance e-bikes needing ample power.
Specifically optimized for electric fat and cargo bikes that require substantial power for conquering demanding trails or hauling heavy loads. The ample low-end torque rips across rough terrain or flies up steep pitches.
Cable Routing
The power and data cables route internally through the hollow axle for the cleanest installation. This neatly hides away all the cabling fully inside the frame tubing so you don’t see any messy external wires dangling about.
Routing through the axle also protects the cables from environmental exposure and damage. Quick access removable axle caps provide easy motor servicing without fully removing the wheel.
Cable Length
At 200mm total length, the cables are long enough for flexible wiring through the frame while avoiding excessive slack needing accommodation.
The length lets you route bends generously to reduce stress and wear over bumps. Any shorter and installing gets tricky, any longer requires too much internal frame space.
Sprocket Wheel
It is CNC machined to fit small 6 or 7 tooth freewheel sprockets. More sprocket teeth provide higher torque output to the wheel, while fewer teeth provide more outright top speed.
We recommend the 7 tooth sprocket for general trail riding, with 6 teeth for maximum speed. The gear reduction complements the internal hub ratio for tremendous torque multiplication.
Brake Style
This direct drive hub works with any basic hydraulic or mechanical disc brake system for all-weather stopping confidence. Discs provide far stronger wet braking performance than rim brakes which can be sketchy in the rain.
Having ample front wheel braking power gives you better control when descending steep, loose trails. The hub has standard mount points to bolt on your bike’s caliper directly.
Spokes Holes
The hub flanges utilize a 36 hole drilling pattern to lace three cross patterns using 12-13g spokes. More spokes spreads the torque over more wheels for a stronger wheel that stays true pounding through rough terrain.
36 holes is the standard for ebike applications seeing high torque loads. The spokes all connect to thick flanges coming off the hub to handle the forces.
Spokes Size
Either 13 gauge (2.3mm) or swaged 12 gauge (2.6mm) spokes must be used to manage the torque loads.
Thicker spokes are very strong in tension and fatigue resistant compared to thinner spokes used on bicycle wheels. They are less likely to wind up or break dealing with high power.
Spokes Central Distance
The wider 145mm boost spacing creates a laterally stiffer wheel using shorter spokes compared to older 135mm spacing. The shorter spokes are stronger and more durable.
Boost spacing also provides more tire clearance from the chain and seatstays for fitting fatter rubber.
Open Size
At 175mm wide, this hub has tons of room for the biggest fat bike tires exceeding 5 inches width. Lots of clearance prevents tires rubbing at low pressures or under hard cornering side-loads.
Wheel Size
The S7-175XR fits all common bicycle ISO / ETRTO wheel sizes from 406mm (20″) to 622mm (700c). It also accommodates old English sizes like 26″. This versatility allows lacing wheels for virtually any e-bike.
Voltage
Configured to operate on 36V, 48V or 52V eBike battery supplies. Higher voltage extends top speed while lower voltage allows cheaper battery options and improves efficiency.
Custom tuning allows adjusting the motor for any voltage between 36V and 60V.
Rated Power
Available in 350W, 500W or 750W power levels to match your performance needs and regional regulations.
More power yields faster acceleration and higher top speeds, while limiting power increases efficiency for longer range. Generous low-end torque makes child’s play of steep pitches.
Max Speed
Achieves 32-45 km/h max speed depending on power level. The 750W reaches over 45 km/h with ideal conditions. The smaller sprocket can extend the top speed further at the expense of torque.
Max Torque
Mighty 75 Nm of torque rips up gnarly trails and charges up steep inclines. Way more grunt than a mid drive motor in a compact hub package, reducing your need to downshift the bike’s gears.
Reduction Ratio
The internal 5.18:1 gear reduction generates huge wheel torque, multiplying the motor’s power over 4 times. This gives outstanding off-road performance but limits top speed potential.
The massive low-end power and traction makes trails disappear under the wheels.
Magnet Items
A whopping 20 high strength neodymium magnets deliver very impressive torque density from a reasonably compact hub shell. More magnets require more counteracting stator windings, keeping electromagnetic forces under control.
Speed Sensor
Multiple speed sensors around the motor give precise rotor position and speed feedback to the smart controller.
This enables optimal torque vectoring for great handling and control. More sensors result in smoother low speed modulation and response.
Efficiency
A class-leading 80% efficiency minimizes electrical losses through resistance heating, reducing battery drain for excellent range per charge. High efficiency requires sophisticated construction and control algorithms.
Work Temperature
Functional across a wide -20° C to 45° C temperature range in all climates without performance deterioration or reliability concerns. The controller throttles power nearing the limits to prevent overheating damage.
Noise Level
Precision zero-cogging winding technology keeps noise below 50 dBA even pounding up steep hills.
Quiet performance doesn’t disturb wildlife and other trail users trying to enjoy nature’s peace. The direct drive is silent since there are no internal gears.
Weight
At just 4.3 kg, the S7-175XR is remarkably lightweight given its robust construction and high power ratings.
Less unsprung mass improves suspension function and handling for increased control and comfort riding through rubble.
Waterproof Level
IP65 rating proves the S7-175XR resists dust ingress and direct high pressure water jets from any direction. The motors withstand gritty, wet riding abuse for years without electrical issues.
Shells Material
The hub outer case uses light yet strong aluminum alloy rather than steel or plastic. This achieves a great power to weight ratio.
Aluminum offers excellent structural properties under high loads while also conducting heat well from inside the motor. This boosts overall thermal performance, essential when riding long mountain climbs.
Summary
the S7-175XR is an extremely capable rear hub motor perfect for high power fat tire e-bikes. Its wide diameter swallows massive tires while the internal gear reduction serves up tons of wheel torque, multiplying the already impressive motor torque over 4 times.
If you want a bulletproof, high performing hub to electrify your fat-tire bike for aggressive trail riding, the S7-175XR delivers exceptional quality and unmatched power.
4. TO7MOTOR: B7-138XR HUB MOTOR: WHAT YOU NEED TO FUEL YOUR MOUNTAIN RIDE (350W, 500W, 750W)
- E-MOUNTAIN BIKE
- E-CARGO BIKE
Colour
We offer the B7-138XR hub motor in both stealthy black or silver finishes to match different ebike aesthetics. Some customers love the aggressive look of a murdered-out black ebike, while others prefer the industrial vibe of a machined aluminum finish contrasting the frame.
Ultimately the colour choice is cosmetic – it does not impact technical performance. We can even customize other colour options to perfectly match special paint jobs.
Installation Site
This rear hub motor provides rear wheel drive power delivery. Mounting a geared hub motor in the rear allows the high torque output to be reduced through additional gearing using the bike’s gears and sprocket.
This allows tuning the power delivery for smooth traction control and progression across the speed range. Rear drive also places more weight over the drive wheel compared to a front hub.
This extra mass improves traction through added grip and friction, so you can put more power down off the line without excessive wheel spin. The rear location is also ideal for cargo e-bikes where the heavy load already sits over the back end.
Applied for E-bikes
The B7-138XR is purpose-built for high power electric mountain and cargo bikes that require generous low-speed torque for conquering demanding trails or hauling heavy loads.
We optimized the torque-biased power delivery to prevent wheel spin so you always get maximum thrust, even riding 2-up or shouldering big cargo weight. It has potential as an electric motorcycle hub too.
Cable Routing
The power and data cables exit only the left side of this rear hub motor for clean frame integration that hides away the wiring.
Routing the cables along the left chainstay allows them to enter the downtube for internal routing inside the frame, concealing everything for super clean aesthetics.
No messy cables dangling externally. Exiting just one side also makes removing the rear wheel quicker for maintenance since you don’t have to unplug cables from both sides.
Cable Length
At 200mm total length, the cables are sufficiently long for flexible wiring routed through the frame while avoiding excessive slack needing accommodation inside.
The length enables generous bend radii to prevent tight stress points and wear over years of vibration. Any shorter cable would make installation very tricky, while longer cables require too much internal frame space which is limited on most bikes.
Sprocket Wheel
The B7-138XR is CNC machined to fit standard 6 or 7 tooth freewheel sprockets. More rear sprocket teeth provide higher torque output to the wheel, while using fewer teeth provides more outright top speed potential.
We recommend the 7 tooth sprocket for most general trail riding applications, with the 6 tooth for maximum speed. This additional gear reduction works with the internal hub ratio to achieve tremendous torque multiplication at the rear wheel.
Brake Style
This powerful direct drive hub works with any basic hydraulic or mechanical disc brake system to provide all-weather stopping confidence.
Disc brakes offer far stronger wet weather braking performance compared to rim brakes which can be sketchy when riding steep, loose trails in the rain.
Having ample front wheel braking power gives you the utmost speed control and confidence when descending rugged terrain. The hub has industry standard mount points to directly bolt on your bike’s brake caliper.
Spokes Holes
The hub flanges utilize a 36 hole drilling pattern to properly lace three cross patterns using thick 12-13 gauge spokes. Having more spokes spreads the torque over a larger wheel area for a stronger wheel build that stays true even when pounding through rough terrain.
36 holes is the accepted standard for ebike applications seeing such high torque loads. The spokes all connect to robust flanges coming off the hub shell to handle the forces without tearing out.
Spokes Size
Either 13 gauge (2.3mm) or swaged 12 gauge (2.6mm) double butted stainless steel spokes must be used to withstand the extreme hub motor torque loads.
These thicker spokes are extremely strong in tension and fatigue resistant compared to thinner spokes used on bicycle wheels. They are much less likely to wind up, deform, or break when dealing with high power over years of hard riding.
Spokes Central Distance
The wider 146mm boost rear spacing creates a laterally stiffer wheel using shorter spokes compared to older 135mm spacing.
The reduced spoke length enables higher tension levels for a stronger wheel, while also minimizing flex for improved power transfer. Boost spacing also provides more tire clearance from the chain and seatstays which is needed when fitting wider, knobbier rubber.
Open Size
With 138mm between the flanges, this hub has lots of room for fitting aggressive e-mountain bike tires up to 2.6″ wide.
The ample clearance prevents tires rubbing at low inflation pressures during hard cornering. Wider tires can also be run for maximum traction and cushion.
Wheel Size
The B7-138XR fits all common bicycle ISO / ETRTO wheel sizes from small 406mm (20″) wheels to large 29er 622mm (700c) wheels.
It also perfectly accommodates old English 26″ sizes and 27.5″ wheels, enabling wheels for virtually any e-bike.
Voltage
Configured to operate on 36V, 48V or 52V eBike battery supplies. Higher voltage extends the top speed capabilities while lower voltage allows cheaper battery options and improves efficiency.
Custom tuning of the smart controller enables adjusting the motor for any voltage between 36V and 60V as needed.
Rated Power
Available in 350W, 500W or 750W power levels to precisely match your performance needs and regional electric bike regulations.
More rated wattage generally provides faster acceleration, higher top speeds, and greater peak climbing torque. We offer lots of low-end torque to make easy work of the steepest pitches. Selecting lower power levels increases efficiency for longer range per charge.
Max Speed
Achieves 32-45 km/h maximum speed depending on the power level setting and voltage used. The 750W motor reaches over 45 km/h in ideal conditions with 52V or higher battery voltage used.
Smaller rear sprockets can extend the top speed further when desired, at the expense of low end torque.
Max Torque
This hub motor churns out over 75 Nm of relentless torque to the rear wheel. That’s way more grunt than the best mid drive motors in the market, all packed into a compact hub package.
This incredible torque allows charging up the steepest technical climbs without needing to downshift the bike’s gears. Just twist and go with extreme traction on tap.
Reduction Ratio
The internal 7.77:1 gear reduction generates tremendous wheel torque, multiplying the motor’s already high torque over 4 times.
This gives outstanding off-road traction and low speed control but does limit outright top speed potential…which is useless off-road anyway! The massive low-end power makes trails and inclines disappear under the wheels. You’ll love blasting up climbs that once seemed impossible.
Magnet Items
16 high strength neodymium magnets deliver extremely impressive torque density from a reasonably compact hub shell, considering its power class.
More magnets require additional counteracting stator windings to handle the intense electromagnetic forces generated. We optimize the design to balance size, power, and efficiency.
Speed Sensor
Multiple speed sensors placed around the motor report back precise rotor position and speed feedback data to the smart controller.
This enables proper torque vector calculations for optimal efficiency and power delivery. More sensors result in ultra smooth low speed modulation with liquid response you’ll love in technical sections.
Efficiency
We achieve a class-leading 80% efficiency rating, minimizing electrical losses mainly through resistance heating in the windings.
Less wasted energy equates to less battery drain so you can go farther on a charge. We spend countless hours optimizing the motor design and control algorithms to maximize efficiency across the power band.
Work Temperature
The B7-138XR operates in a wide ambient temperature range from frigid -20° C to hot 45° C heat without performance deterioration or reliability concerns arising.
The smart controller throttles power if temperature limits are exceeded to avoid overheating damage. You’ll have total confidence riding in any environment.
Noise Level
Precision zero-cogging winding technology keeps unwanted noise to a minimum, measured below 50 dBA even when pounding up steep hills drawing peak power.
Quiet performance allows sneaking up on wildlife and doesn’t annoy other trail users trying to enjoy some peace in nature and isolate from urban noise. The direct drive mechanism is silent since there are no internal gears.
Weight
At just 3.5 kg, the B7-138XR is remarkably lightweight given its robust construction and high power ratings.
Less unsprung mass improves suspension function and handling for increased control and comfort when riding technical trails. Lighter weight also makes lifting the bike over obstacles less tiring.
Waterproof Level
The high IP65 rating proves the B7-138XR resists dust ingress as well as direct high pressure water jets from any direction.
The motors can withstand complete submersion in water up to 1 meter deep. This level of protection lets them thrive with gritty, wet riding abuse for years without corrosion or electrical issues.
Shells Material
The hub outer case uses resilient yet lightweight aluminum alloy rather than steel or plastic. This achieves impressive performance from a compact package by minimizing weight while easily handling all the structural loads.
Aluminum offers excellent strength properties under high impacts while also conducting heat extremely well from the inside motor components to the outer shell. This boosts overall cooling and thermal performance, essential when riding long mountain climbs drawing peak power.
Summary
the B7-138XR is an extremely capable rear hub motor perfect for high power electric mountain and cargo bikes that require generous torque for conquering trails or moving heavy loads.
Its wide diameter and internal gear reduction serve up tons of wheel torque from a lightweight package ready for aggressive riding. Paired with hydraulic brakes, this hub will transform your bike into an all-terrain monster!
5. TO7MOTOR: K7-125DL HUB MOTOR: THE ALL-IN-ONE SPECIAL, Perfect for City, Foldable, and Touring E-Bikes (250w, 350w)
The K7-125DL joins our refined K7 Series of electric bike hub motors engineered specifically for urban e-bikes.
USAGE:
- E-CITY
- E-FOLDABLE BIKE
- E-TOUR BIKE
As part of the K7 lineup optimized for city riding, this new 125mm wide rear hub motor provides smooth, quiet power perfectly suited for e-city, e-touring, and e-folding bikes spending most time on paved surfaces.
With advanced control firmware minimizing noise and maximizing efficiency, this geared rear wheel drive K7 motor brings a polished riding experience made for upgraded street ebikes needing reliable all-weather performance.
Colour
We offer the K7-125DL hub motor in both menacing gloss black or natural silver finishes to match different ebike aesthetics.
Some customers love the stealthy look of a murdered-out black urban ebike, while others prefer the industrial metallic sheen of a machined aluminum motor contrasting a chrome frame. Ultimately the colour choice is cosmetic only and does not impact technical performance.
Installation Site
This rear hub motor provides rear wheel drive power delivery. Mounting a geared hub motor in the rear allows the high torque output to be reduced through additional gearing using the bike’s gears and sprocket.
This allows tuning the power delivery for smooth and safe traction control across the speed range – important when riding in traffic.
Rear drive also places more weight over the drive wheel compared to a front hub. This extra mass improves traction through added grip and friction, so you can accelerate smoothly from stops without excessive wheel spin.
Applied for E-bikes
The K7-125DL is optimized for city, commuting and road e-bikes that spend most time on paved surfaces.
The torquey yet smooth power delivery provides excellent safety and control riding busy urban streets and bike paths. Generous torque conquers hills while the streamlined design cuts through wind.
Cable Routing
The power and data cables exit only the left side of this rear hub motor for clean frame integration that hides away the wiring inside the frame tubing.
Exiting just one side allows the cables to enter the seat tube or downtube for internal routing, fully concealing them for minimalist aesthetics. No ugly external cables dangling about.
Cable Length
At 200mm total length, the cables are sufficiently long for flexible wiring routed internally through the frame while avoiding excessive slack needing accommodation.
The length enables generous bend radii inside the tight tubing to prevent pinching and wear over thousands of vibration cycles. Any shorter and installing gets extremely tricky.
Sprocket Wheel
The K7-125DL has an integrated single speed freewheel so no additional rear sprocket is needed. This simplifies the installation and drivetrain for reduced maintenance.
The internal ratio provides a good blend of torque and top speed for efficient city riding.
Brake Style
This hub is compatible with basic hydraulic or mechanical rim brakes for reliable all-weather stopping.
Powerful disc brakes are not necessary given the more modest power and speed levels expected for road use. Smooth modulation provides excellent control when braking in traffic.
Spokes Holes
The hub flanges utilize a 36 hole drilling pattern to properly lace three cross patterns using 12-13 gauge spokes. More spokes spreads the torque over a larger wheel area for added strength.
The holes all connect to thick flanges coming off the hub to handle the forces.
Spokes Size
Either 13 gauge (2.3mm) or swaged 12 gauge (2.6mm) double butted stainless steel spokes should be used. These thicker spokes have high tension strength and fatigue life for ebike loads.
Spokes Central Distance
At just 113mm, the spacing matches common road bike rear dropouts for direct installation. Short spokes make a very stiff wheel for efficient power transfer.
Open Size
The 125mm width between flanges fits most road and city tires up to 45mm wide. Road tires as narrow as 25mm can also be installed. Lots of clearance for fenders, racks, etc.
Wheel Size
Incredibly versatile fitting wheels from tiny 12″ kids bikes up to 28″ BMX and mountain bike sizes. It also takes common road sizes like 26″ and 700c. Almost any bike wheel can be built around this hub.
Voltage
Configured to operate on lower 24V to 48V eBike battery supplies. Lower voltage allows cheaper battery options while providing very efficient operation.
Custom tuning enables adjusting the smart controller for any voltage between 24V and 52V.
Rated Power
Offered in 250W or 350W power levels to precisely match legal regulations. Modest power provides brisk acceleration and moderate top speeds while maximizing efficiency for long urban range. 250W is common for Europe, 350W for North America.
Max Speed
Achieves 25-35 km/h top speeds depending on the power level setting. Lower speeds maximize safety and efficiency for bike path and urban riding. High top speed is not necessary.
Max Torque
Churns out 45+ Nm of torque from a petite hub shell. Smooth torque delivery combined with the internal gear reduction avoids sudden power surges for confident control in traffic.
Reduction Ratio
An extremely high 8.14:1 ratio generates ample wheel torque from the modest motor power, while limiting top speed. This is ideal for urban acceleration and hill climbing without excessive speed.
Magnet Items
16 high strength magnets create an optimized blend of motor torque density, size, and efficiency. More magnets require additional stator windings to handle the electromagnetic forces.
Speed Sensor
Multiple sensors provide rotor position/speed feedback to the smart controller for precision torque calculations maximizing efficiency. Smooth response aids handling around cars.
Efficiency
A class-leading 80% rating minimizes losses as heat to reduce battery usage so you go farther. We spend extensive development time optimizing the motor design and control algorithms to maximize efficiency.
Work Temperature
It operates in a wide -20° C to 45° C temperature range in all climates without performance deterioration or reliability issues. The controller throttles power nearing the limits preventing damage.
Noise Level
Precision winding technology keeps unwanted noise below 50 dBA even under heavy loads. Quiet operation allows enjoying peaceful bike paths without disturbing others. The freewheel is silent coasting too.
Weight
At just 2.2 kg, the K7-125DL is remarkably light, even for non-powered hubs. Less mass improves acceleration and handling compared to heavier motors. Easy to carry or lift.
Waterproof Level
IP65 rating proves the K7-125DL resists dust ingress and direct high pressure water jets from any direction, critical for urban environments.
The motor withstands gritty wet abuse without corrosion or electrical issues.
Shells Material
The hub outer case uses lightweight yet strong aluminum alloy rather than steel or plastic. This keeps weight low while easily handling all the structural loads.
Aluminum also conducts heat well from inside the motor components to the outer shell for efficient cooling.
Summary
the K7-125DL is an extremely smooth, quiet and efficient rear hub motor perfect for urban e-bikes. Generous torque conquers hills while a streamlined design cuts through wind.
Subtle power delivery ensures confident control riding busy streets.
6. TO7MOTOR: E7-100QL HUB MOTOR: PERFECT MOTOR FOR A CHILL AND RELAXING RIDE IN THE CITY (250W, 350W)
- E-CITY BIKE
- E-TOUR BIKE
- E-FOLD BIKE
Colour
We offer the E7-100QL hub motor in both stealthy black or shiny silver finishes to match different ebike aesthetics.
Some customers love the menacing look of a murdered-out black street ebike, while others may prefer the industrial vibe of a machined aluminum motor contrasting a chrome frame. Ultimately the colour choice is cosmetic only and does not impact technical performance.
Installation Site
This front hub motor provides front wheel drive power delivery. Mounting the compact hub up front allows the motor torque to directly drive the wheel without any gear reduction.
Front drive places more weight over the front tire to increase traction compared to a rear hub system. The weight bias also improves high speed stability by preventing the front end from wandering.
Applied for E-bikes
The E7-100QL is optimized for city, touring and road ebikes spending most of their time on paved streets and bike paths rather than off-road.
The smooth, consistent power delivery provides excellent control and safety when riding in dense urban traffic or groups. Generous torque gets you up to speed fast from stops and conquers hills effortlessly.
Cable Routing
The power and data cables exit only the left side of this front hub motor for clean frame integration that hides away the wiring inside the frame tubes.
Exiting just one side allows entering the downtube through the headtube for fully internal routing and minimalist aesthetics. No ugly external cables dangling about.
Cable Length
At 200mm total length, the cables are sufficiently long for flexible wiring routed internally through the frame while avoiding excessive slack needing accommodation.
The length enables smooth bends inside the tight tubing to prevent pinching, kinking or early fatigue failure.
Sprocket Wheel
This direct drive hub does not use or require an additional sprocket. It drives the wheel directly with no gear reduction.
Direct drive maximizes durability and minimizes maintenance since there are no gears inside that can fail over time. It also facilitates regenerative braking to capture kinetic energy while decelerating.
Brake Style
This hub is compatible with any basic hydraulic or mechanical DISC brake system commonly used on road and commuter ebikes.
Discs remain reliable in all weather conditions, essential for urban transportation. They also provide excellent modulation for smooth, controlled stops in traffic.
Spokes Holes
The hub flanges utilize a 36 hole drilling pattern to properly lace three cross patterns using 12-13 gauge spokes. More spokes spreads the torque over a larger wheel area for added strength to handle the internal forces.
The holes all connect to thick flanges coming off the hub to handle the tension.
Spokes Size
Either 13 gauge (2.3mm) or swaged 12 gauge (2.6mm) double butted stainless steel spokes should be used. These thicker spokes have high tensile strength and fatigue life to withstand ebike loads.
Spokes Central Distance
At just 98mm, the narrow spacing matches common road and city bike front forks for direct installation without frame modification.
Short, stiff spokes make for responsive acceleration and nimble handling riding through traffic.
Open Size
The 100mm width between flanges fits most common road and city tires up to 45mm wide. Road tires as narrow as 25mm can also be installed without issue. Lots of clearance for fenders and racks.
Wheel Size
Incredibly versatile fitting wheels from tiny 12″ kids bikes up to 28″ BMX and mountain bike sizes. It also perfectly takes common road sizes like 26″ and 700c. Almost any bike wheel can be built around this hub.
Voltage
Configured to operate on lower 24V to 48V eBike battery supplies. Lower voltage allows cheaper battery options while providing very efficient operation critical for smaller city ebikes.
Custom tuning enables adjusting the smart controller for any voltage between 24V and 52V.
Rated Power
Offered in 250W or 350W power levels to precisely match legal regulations across regions.
Modest power provides brisk acceleration without unintentional wheel spin while maximizing efficiency for extended urban range up to 100km.
Max Speed
Achieves 25-35 km/h top speeds depending on the power level setting. Lower speeds maximize safety and efficiency for bike path and urban riding where high speed is unnecessary.
Max Torque
Churns out 40+ Nm of torque from a tiny hub shell. Smooth torque delivery combined with the internal gear reduction avoids sudden power surges for confident control around cars.
Reduction Ratio
An extremely high 11:1 ratio generates ample wheel torque from the modest motor power, while limiting top speed. This is ideal for urban acceleration and hill climbing without excessive speed.
Magnet Items
16 high strength magnets create an optimized blend of motor torque density, size, and efficiency. More magnets require additional stator windings to handle the electromagnetic forces.
Speed Sensor
Multiple sensors provide rotor position/speed feedback to the smart controller for precision torque calculations maximizing efficiency. Smooth response aids handling through chaotic city traffic.
Efficiency
A class-leading 80% efficiency rating minimizes losses as heat to reduce battery usage so you go farther per charge. We spend extensive R&D time optimizing the motor design and control algorithms to maximize real-world efficiency.
Work Temperature
It operates in a wide -20° C to 45° C temperature range in all climates without performance deterioration or reliability issues. The controller throttles power nearing the limits preventing damage.
Noise Level
Precision winding technology keeps unwanted noise below 50 dBA even under peak loads. Quiet operation allows enjoying peaceful bike paths without disturbing others. The direct drive mechanism is silent coasting too.
Weight
At just 1.7 kg, the E7-100QL is remarkably light, even for non-powered hubs. Less mass improves acceleration and handling compared to heavier motors that can feel sluggish and clumsy.
Waterproof Level
IP65 rating proves the E7-100QL resists dust ingress and direct high pressure water jets from any direction, critical for urban environments.
The motor withstands gritty wet abuse without corrosion or electrical issues.
Shells Material
The hub outer case uses lightweight yet strong aluminum alloy rather than steel or plastic. This keeps weight very low while easily handling all the structural loads.
Aluminum also conducts heat well from inside the motor components to the outer shell for efficient air cooling.
Summary
the E7-100QL is an extremely smooth, quiet and efficient front hub motor perfect for urban e-bikes. Generous torque accelerates quickly from stops while a streamlined design cuts through wind.
Subtle power delivery ensures safe control navigating congested city streets.
7. TO7MOTOR: C7-195XR HUB MOTOR: PERFECT CHOICE TO ENJOY A ENJOYABLE AND AFFORDABLE RIDE (250W, 350W) [PUBLIC MOLD]
The C7-195XR joins our capable C7 Series of electric bike hub motors engineered specifically for fat tire e-bikes.
USAGE:
- E-CITY BIKE
- E-TOUR BIKE
As part of the C7 lineup optimized for floating across sand and snow, this new 195mm wide rear hub motor provides smooth, quiet power perfectly suited for giving fat e-bikes all-terrain capability. ]
With advanced control firmware ensuring optimal traction, this geared rear wheel drive C7 motor brings formidable performance for upgrading existing fat bikes or tackling your most ambitious scratch-built oversnow and beach cruiser projects.
Colour
We offer the C7-195XR hub motor in both menacing gloss black or natural silver finishes to match different ebike aesthetics.
Some customers love the stealthy look of a murdered-out black fat bike that disappears into the landscape.
Others may prefer the industrial vibe of a machined aluminum motor contrasting a chrome frame. Ultimately the colour choice is cosmetic only and does not impact technical performance.
Installation Site
This rear hub motor provides rear wheel drive power delivery. Mounting a geared hub motor in the rear allows the high torque output to be reduced through additional gearing using the bike’s gears and sprocket.
This allows tuning the power delivery for smooth traction control across the speed range. Rear drive also places more weight over the drive wheel compared to a front hub. This extra mass improves traction through added grip and friction to propel the heavy fat tires.
Applied for E-bikes
The C7-195XR is optimized specifically for fat tire ebikes needing substantial low-end power to move the oversized rubber across various conditions like sand, snow or mud where the tires excel.
The smooth torque delivery prevents sudden surge power spikes that can break traction in loose terrain. It has potential as a mini electric motorcycle hub too.
Cable Routing
The power and data cables route internally through the hollow axle for the cleanest installation. This fully hides away all the cabling inside the frame tubing so you don’t see any messy external wires dangling about.
Routing through the axle also protects the cables from environmental exposure and damage. Quick access removable axle caps provide easy motor servicing without fully removing the wheel.
Cable Length
At 200mm total cable length, installation flexibility is maximized while minimizing excess length needing frame accommodation. The length allows generous cable bend radii to prevent pinching, kinking or early fatigue failure. Any shorter cable would make installation extremely tricky.
Sprocket Wheel
It is CNC machined to fit standard 6 or 7 tooth freewheel sprockets. More rear sprocket teeth provide higher torque output to the wheel, while using fewer teeth provides more outright top speed potential.
We recommend the 7 tooth sprocket for most general off-road riding, with the 6 tooth for maximum speed. This additional gear reduction works with the internal hub ratio to achieve excellent torque multiplication at the rear wheel.
Brake Style
This powerful direct drive hub works with any basic hydraulic or mechanical DISC brake system to provide all-weather stopping confidence.
Discs offer much stronger wet weather braking performance compared to rim brakes. Having ample front wheel braking power gives you greater control when descending loose terrain. The hub has standard mount points to directly bolt on your bike’s caliper.
Spokes Holes
The hub flanges utilize a 36 hole drilling pattern to properly lace three cross patterns using 12-13 gauge spokes. More spokes spreads the torque over a larger wheel area for added strength to handle the internal forces.
36 holes is the accepted standard for ebike applications seeing such high torque. The spokes all connect to thick flanges coming off the hub shell to handle the tension.
Spokes Size
Either 13 gauge (2.3mm) or swaged 12 gauge (2.6mm) double butted stainless steel spokes must be used to withstand the extreme hub motor torque loads.
These thicker spokes are extremely strong in tension and fatigue resistant compared to thinner spokes used on bicycle wheels. They are much less likely to wind up, deform, or break when dealing with high power over years of hard riding.
Spokes Central Distance
The wider 130mm spacing matches wider “fat bike” frames providing ample tire clearance while allowing shorter, stiffer spokes to be used.
The reduced spoke length enables higher tension for a stronger wheel, while minimizing flex for improved power transfer. Short, stiff spokes also reduce wheel flex burdening the suspension.
Open Size
With a cavernous 195mm between the flanges, this hub swallows the biggest 5″ fat tires without rubbing or interference even at extremely low inflation pressures when cornering or compressing through obstacles.
Maximum drive traction and floatation can be achieved using the widest rubber.
Wheel Size
The C7-195XR fits both common 20″ and 26″ fat bike wheel sizes. It also accommodates larger 27.5, 29, and 700c sizes so wheels can be built for almost any ebike.
Compatibility maximizes customer flexibility.
Voltage
Configured to operate on lower 24V to 48V eBike battery supplies. Lower voltage allows cheaper battery options while providing very efficient operation critical for smaller ebikes needing long range.
Custom tuning enables adjusting the smart controller for any voltage between 24V and 60V.
Rated Power
Offered in just 250W or 350W power levels to precisely match Europe and North America ebike regulations. Modest power provides brisk acceleration without breaking traction while maximizing efficiency for extended range up to 100km.
Low power also prevents burning out the rear tire which is easy to do with all the torque on tap.
Max Speed
Achieves 25-35 km/h top speeds depending on the power level setting. Lower speeds maximize safety and efficiency for off-road riding where high speed is unnecessary and potentially dangerous.
These speeds are ideal for mixed city/trail riding.
Max Torque
Churns out 45+ Nm of torque from a mid-sized hub shell. This already high torque gets multiplied over 4 times at the wheel by the internal gear reduction, providing tons of traction even from a standstill.
Smooth power delivery avoids sudden surges that break traction in loose terrain. You’ll clean steep pitches that previously seemed impossible!
Reduction Ratio
An internal 5.16:1 gear reduction generates ample wheel torque from the modest motor power, while limiting top speed.
This tuning is optimized for off-road traction and hill climbing rather than high speed pavement riding. Lower gearing maximizes control and safety.
Magnet Items
A whopping 20 high strength neodymium magnets deliver extremely impressive torque density from a reasonably compact hub package considering its power class.
More magnets require additional counteracting stator windings to handle the intense electromagnetic forces generated. We’ve optimized the design to balance size, weight and performance.
Speed Sensor
Multiple speed sensors placed around the motor report back precise rotor position and speed feedback data to the smart controller.
This enables proper torque vector calculations for optimal efficiency and power delivery. More sensors provide ultra smooth low speed modulation with liquid response you’ll love in technical sections.
Efficiency
We achieve a class-leading 80% efficiency rating, minimizing electrical losses mainly through resistance heating in the motor windings and gear transmission.
Less wasted energy equates to less battery drain so you can ride farther on a charge. We spend countless hours optimizing the motor design and control algorithms to maximize real-world efficiency.
Work Temperature
The C7-195XR operates in a wide ambient temperature range from frigid -20° C to hot 45° C heat without performance deterioration or reliability concerns arising.
The smart controller throttles power if temperature limits are exceeded to avoid overheating damage. You’ll have total confidence riding in any environment.
Noise Level
Precision zero-cogging winding technology keeps unwanted noise to a minimum, measured below 50 dBA even when pounding up steep hills drawing peak power.
Quiet performance allows sneaking up on wildlife and doesn’t annoy trail users seeking peaceful nature. The helical internal gear transmission is silent too since it uses smooth torque transfer rather than loud straight cut gears.
Weight
At just 3.2 kg, the C7-195XR is remarkably lightweight given its cavernous diameter and robust construction. Less unsprung mass improves suspension function and handling for increased control and comfort riding through rubble. Easy to carry too!
Waterproof Level
The high IP65 rating proves the C7-195XR resists dust ingress as well as direct high pressure water jets from any direction. The motors withstand complete submersion in water up to 1 meter deep.
This level of protection lets them thrive with gritty, wet riding abuse for years without corrosion or electrical issues.
Shells Material
The hub outer case uses resilient yet lightweight aluminum alloy rather than steel or plastic. This achieves impressive performance from a compact package by minimizing weight while easily handling all the structural loads.
Aluminum offers excellent strength properties under high impacts while also conducting heat extremely well from inside the motor to the outer shell. This boosts overall cooling and thermal performance, essential when riding long distances drawing peak power.
Summary
the C7-195XR provides smooth, efficient power tailored specifically for high traction fat tire e-bikes. The ample torque and cavernous width supply capability across all soft terrain where the oversized tires excel year-round.
This hub will transform your fat bike into a unstoppable all-terrain vehicle!
8. TO7MOTOR: A7-100YL HUB MOTOR: MAKING YOUR WHEELCHAIR FAR EASIER TO USE (250W, 350W)
The A7-100YL joins our adaptable A7 Series of electric mobility hub motors engineered specifically to electrify manual wheelchairs.
USAGE:
- WHEELCHAIR
As part of the A7 lineup tailored for specialty applications, this new 8″ rear hub motor bolts onto standard wheelchair wheels to deliver smooth, reliable power perfectly suited for enhancing mobility independence.
Optimized for safety with tunable torque delivery, the A7-100YL empowers wheelchair users with upgraded capability to traverse previously unmanageable terrain and obstacles.
By electrifying manual chairs with simplified installation, this wheelchair drive system unlocks life-changing freedom and accessibility.
Mounting Position
This hub motor is engineered specifically for rear wheel drive installation to power electric wheelchair mobility. Mounting the compact drive system in the rear positions additional weight over the drive wheel to increase traction compared to front wheel drive chairs.
The rear weight bias also enhances stability when traversing inclines and obstacles. Rear drive minimizes transmission components for high reliability too.
Cable Routing
The power and data cables exit only the left side of this hub motor for clean integration into the wheelchair frame without exposed cables dangling externally.
Routing the wiring internally provides an aesthetic, streamlined setup not possible using external motors. Quick access ports enable servicing the hub without intensive wheelchair disassembly.
Shell Color
The A7-100YL comes standard in menacing gloss black or natural silver finishes to match different wheelchair styles and user preferences.
Ultimately the color choice is purely cosmetic to complement the chair aesthetics – it does not impact technical performance. We can customize other colors to perfectly match special paint jobs.
Rated Power
Available in just 250W or 350W power levels to meet typical electric wheelchair needs. The modest power ratings provide completely sufficient propulsion torque without excessive top speed.
Optimizing efficiency for extended battery range per charge is critical for wheelchair users – so we limit power in favor of maximizing operating duration between charges.
Rated Voltage
Configured to operate on conventional 24V or 36V wheelchair system voltages. Using familiar voltage levels allows utilizing proven battery solutions to minimize costs.
The programmable controller enables fine tuning the operating voltage from 24V to 48V as needed – providing flexibility as battery technology evolves.
Wheel Size
Engineered specifically around compact 8” rear wheelchair wheels, the hub replaces standard wheels for a simplified bolt-on upgrade.
Maintaining the original wheelchair ergonomics and ride height prevents user disruption. High torque from a standstill also minimizes tipping risk. We customize other wheel sizes on request.
Reduction Ratio
An internal 5.61:1 gear reduction ratio generates ample torque for reliably propelling wheelchairs from a reasonably compact hub motor.
The torque multiplication also safely limits top speed potential without impairing low-end performance critical for mobility. Custom gear tuning prevents sudden power spikes for smooth control.
Efficiency
We achieve an impressive 80% efficiency rating under real-world operating loads by minimizing electrical losses through precision design and control algorithms.
Maximizing efficiency reduces battery current draw, extending driving range per charge. This optimizes wheelchair usability between charges – a top priority for mobility devices.
Max Torque
The hub produces over 40 Nm of relentless torque output. Robust low-end torque gives wheelchair users complete confidence traversing inclines, ramps, curbs and other obstacles that previously presented mobility challenges.
The hub conquers terrain that requires significant strength with manual chairs.
Max Speed
The geared hub safely achieves 8-12 km/h top speeds based on conditions – fast enough for busy sidewalks. Since the chair travels in pedestrian spaces, higher speeds are intentionally limited for user safety by the gear reduction instead of just the power rating.
Brake Style
Compatible with various hydraulic or mechanical chair brake systems to provide speed control confidence. Electric brakes can be integrated to leverage regenerative charging during deceleration.
Responsive modulation gives excellent control when navigating inclines or ramps.
Magnet Rate
16 compact neodymium magnet poles create optimized torque density balanced with efficiency. More poles require additional motor windings to handle the electromagnetic forces.
We model multiple design combinations to find the ideal configuration.
Speed Sensor
Integrated sensors provide position and speed feedback to the smart controller for precision torque calculations that maximize efficiency and ensure smooth power delivery.
More sensors enable advanced control algorithms and tunable response.
Hall Sensors
Optional Hall effect sensors installed inside the motor report absolute rotor position back to the controller. This facilitates running ultra smooth field-oriented control (FOC) algorithms that further enhance low-speed modulation.
Spoke
Thick 12G or 13G steel spokes handle torque loads without excessive winding or fatigue failure. High strength provides long service life up to 100,000 cycles under peak loads. Custom lacing options are available.
Noise Level
Precision winding techniques minimize unwanted audible noise, measured below 50 dBA even under heavy loads.
Quiet operation allows enjoying peaceful surroundings without annoying motor whine. The geared drive is silent running too.
Work Temperature
Capable of operating in a wide -20° C to 45° C ambient temperature range without performance deterioration or reliability concerns.
The smart controller throttles power if temperature limits are exceeded to avoid overheating damage during extreme cold or hot weather.
Motor Weight
At just 3.0 kg, the A7-100YL is remarkably lightweight given its robust construction. Minimizing mass aids wheelchair handling and reduces rolling resistance for easy maneuverability.
Lightweight motors put less strain on the user during self-propulsion too.
Waterproof Level
IP65 rating proves the hub resists dust ingress and direct high pressure water jets from any direction – essential for outdoor wheelchair use.
The sealed design withstands gritty wet operating conditions without internal corrosion or electrical issues over decades of use.
Summary
The A7-100YL provides high torque from a compact, lightweight package designed to electrify manual wheelchairs with simplified bolt-on installation.
Customized power delivery ensures smooth, reliable mobility with safety at the forefront. This hub motor unlocks freedom and independence!
WHAT ARE THE DIFFERENCES BETWEEN CERTAIN HUB MOTORS HERE?
I’m sure you have some questions floating around in your head, such as, “What are the differences between the K7 motor and the E7 Motors.”
Hopefully, I’ll be answering all the questions you have in your mind, but before I answer these questions, there is something I’ll have to explain clearly: What is public mold?
What is PUBLIC MOLD?
A mold is a tool or form used in manufacturing to shape materials (such as plastic, metal, or composite) into specific shapes.
Which means a public mold means that the mold design is not proprietary or exclusive to a single manufacturer. Manufacturers can use the same mold design to produce e-bike motors without restrictions.
So, basically it means the motor’s design is not special / owned by us, as it is a PUBLIC mold.
D7 SERIES VS S7 SERIES: What’s the difference?
K7 SERIES VS E7 SERIES VS C7 SERIES: What’s the difference?
K7 SERIES E7 SERIES C7 SERIES
- K7 SERIES: The K7 SERIES is bigger and weighs more than the E7 SERIES, The quality is the same.
- E7 SERIES: The E7 SERIES is smaller and weighs less than the K7 SERIES, The quality is the same.
- C7 SERIES: The C7 SERIES is the biggest, more affordable, but that comes at the cost of a little quality.
Conclusion
E-bike hub motors come in geared and direct drive versions, each with unique advantages. Geared motors provide better torque for acceleration and hills, while direct drives can be simpler and more durable.
Consider riding needs and conditions to pick the best motor. Both types continue to improve and advanced models can strike a balance with the ideal characteristics.
